Related Files

Ubuntu Security Notice 1482-3 - USN-1482-1 fixed vulnerabilities in ClamAV. The updated package could fail to properly scan files in some situations. This update fixes the problem. It was discovered that ClamAV incorrectly handled certain malformed TAR archives. A remote attacker could create a specially-crafted TAR file containing malware that could escape being detected. It was discovered that ClamAV incorrectly handled certain malformed CHM files. A remote attacker could create a specially-crafted CHM file containing malware that could escape being detected. Various other issues were also addressed.

Ubuntu Security Notice 1541-1 - Justin Ferguson discovered multiple heap overflows in libotr. A remote attacker could use this to craft a malformed OTR message that could cause a denial of service via application crash or possibly execute arbitrary code.

Ubuntu Security Notice 1540-1 - Kaspar Brand discovered a vulnerability in how the Network Security Services (NSS) ASN.1 decoder handles zero length items. If the user were tricked into opening a specially crafted certificate, an attacker could possibly exploit this to cause a denial of service via application crash.

Ubuntu Security Notice 1539-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Ulrich Obergfell discovered an error in the Linux kernel's memory management subsystem on 32 bit PAE systems with more than 4GB of memory installed. A local unprivileged user could exploit this flaw to crash the system. Various other issues were also addressed.

Ubuntu Security Notice 1538-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service. Various other issues were also addressed.

Ubuntu Security Notice 1537-1 - It was discovered that OpenOffice.org incorrectly handled certain encryption tags in Open Document Text (.odt) files. If a user were tricked into opening a specially crafted file, an attacker could cause OpenOffice.org to crash or possibly execute arbitrary code with the privileges of the user invoking the program.

Ubuntu Security Notice 1536-1 - It was discovered that LibreOffice incorrectly handled certain encryption tags in Open Document Text (.odt) files. If a user were tricked into opening a specially crafted file, an attacker could cause LibreOffice to crash or possibly execute arbitrary code with the privileges of the user invoking the program.

Ubuntu Security Notice 1535-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. An error was discovered in the Linux kernel's memory subsystem (hugetlb). An unprivileged local user could exploit this flaw to cause a denial of service (crash the system). Various other issues were also addressed.

Ubuntu Security Notice 1534-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. An error was discovered in the Linux kernel's memory subsystem (hugetlb). An unprivileged local user could exploit this flaw to cause a denial of service (crash the system). Various other issues were also addressed.

Ubuntu Security Notice 1533-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Ulrich Obergfell discovered an error in the Linux kernel's memory management subsystem on 32 bit PAE systems with more than 4GB of memory installed. A local unprivileged user could exploit this flaw to crash the system. Various other issues were also addressed.

Ubuntu Security Notice 1532-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Ulrich Obergfell discovered an error in the Linux kernel's memory management subsystem on 32 bit PAE systems with more than 4GB of memory installed. A local unprivileged user could exploit this flaw to crash the system. Various other issues were also addressed.

Ubuntu Security Notice 1531-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service. Various other issues were also addressed.

Ubuntu Security Notice 1530-1 - Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation. A remote NFS server (attacker) could exploit this flaw to cause a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

Ubuntu Security Notice 1529-1 - A flaw was discovered in the Linux kernel's macvtap device driver, which is used in KVM (Kernel-based Virtual Machine) to create a network bridge between host and guest. A privileged user in a guest could exploit this flaw to crash the host, if the vhost_net module is loaded with the experimental_zcopytx option enabled. An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Various other issues were also addressed.

Ubuntu Security Notice 1514-1 - A flaw was discovered in the Linux kernel's macvtap device driver, which is used in KVM (Kernel-based Virtual Machine) to create a network bridge between host and guest. A privileged user in a guest could exploit this flaw to crash the host, if the vhost_net module is loaded with the experimental_zcopytx option enabled. An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Various other issues were also addressed.

Ubuntu Security Notice 1527-1 - It was discovered that Expat computed hash values without restricting the ability to trigger hash collisions predictably. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service by consuming excessive CPU resources. Tim Boddy discovered that Expat did not properly handle memory reallocation when processing XML files. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service by consuming excessive memory resources. This issue only affected Ubuntu 8.04 LTS, 10.04 LTS, 11.04 and 11.10. Various other issues were also addressed.

Ubuntu Security Notice 1526-1 - It was discovered that KOffice incorrectly handled certain malformed MS Word documents. If a user or automated system were tricked into opening a crafted MS Word file, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.

Ubuntu Security Notice 1525-1 - It was discovered that Calligra incorrectly handled certain malformed MS Word documents. If a user or automated system were tricked into opening a crafted MS Word file, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.

Ubuntu Security Notice 1524-1 - A large number of security issues were discovered in the WebKit browser and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Ubuntu Security Notice 1523-1 - It was discovered that the NVIDIA graphics drivers could be reconfigured to gain access to arbitrary system memory. A local attacker could use this issue to gain root privileges.

Ubuntu Security Notice 1522-1 - It was discovered that QEMU incorrectly handled temporary files when creating a snapshot. A local attacker could use this flaw to possibly overwrite files with root privilege, or obtain sensitive information from the guest.

Ubuntu Security Notice 1521-1 - Chamal De Silva discovered that the IcedTea-Web Java web browser plugin could dereference an uninitialized pointer. A remote attacker could use this to craft a malicious web page that could cause a denial of service by crashing the web browser or possibly execute arbitrary code. Steven Bergom and others discovered that the IcedTea-Web Java web browser plugin assumed that all strings provided by browsers are NULL terminated, which is not guaranteed by the NPAPI (Netscape Plugin Application Programming Interface). A remote attacker could use this to craft a malicious Java applet that could cause a denial of service by crashing the web browser, expose sensitive information or possibly execute arbitrary code. Various other issues were also addressed.

Ubuntu Security Notice 1520-1 - Emmanuel Bouillon discovered that the MIT krb5 Key Distribution Center (KDC) daemon could free an uninitialized pointer when handling a malformed AS-REQ message. A remote unauthenticated attacker could use this to cause a denial of service or possibly execute arbitrary code. Emmanuel Bouillon discovered that the MIT krb5 Key Distribution Center (KDC) daemon could dereference an uninitialized pointer while handling a malformed AS-REQ message. A remote unauthenticated attacker could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 12.04 LTS. Various other issues were also addressed.

Ubuntu Security Notice 1519-1 - Markus Hietava discovered that the DHCP server incorrectly handled certain malformed client identifiers. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. Glen Eustace discovered that the DHCP server incorrectly handled memory. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service.

Ubuntu Security Notice 1518-1 - Einar Lonn discovered that Bind incorrectly initialized the failing-query cache. A remote attacker could use this flaw to cause Bind to crash, resulting in a denial of service.